JPH0645517Y2 - Small-diameter pipe-propulsion earth removal device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-diameter pipe propelling and discharging device for preventing the inner wall of a small-diameter low load-bearing pipe from being damaged by a screw conveyer for conveying earth and sand.

[0002]

2. Description of the Related Art Generally, a propulsion method for a small-diameter low load-bearing pipe is
As shown in FIG. 4, a tip conductor is attached to the tip of the low load-bearing pipe, the excavation blade provided at the tip of the tip conductor rotates to excavate the front ground, and the earth and sand are taken into the tip conductor to excavate the excavation blade. The method of pushing the rear end of the low load-bearing pipe to propel it while the earth and sand are conveyed to the rear by the screw conveyor sequentially connected to the rear of the is adopted.

As a low load bearing pipe used as a propulsion pipe, a thin-walled pipe such as a vinyl chloride pipe or a reinforced plastic composite pipe having excellent hydraulic characteristics and corrosion resistance is used especially in sewers. As for the transmission of propulsive force, the total propulsive force is applied to the rear end of the low load bearing tube to press the front conductor and the low load bearing tube. It has a low load bearing capacity and is used for relatively short-distance propulsion.

[0004]

[Problems to be Solved by the Invention] In the earth discharging technique of the low load carrying tube propulsion method described above, since the screw conveyor directly rotates in the low load carrying tube to discharge the earth and sand backward, Since the inner wall and the screw conveyor blade are constantly in contact with each other below the inner wall, wear occurs on the inner wall of the low load-bearing pipe, which is weak in material, and the hydraulic characteristics and corrosion resistance are impaired. There is a problem that it is not applied as. Further, due to repeated wear at the same place, breakage or cutting of the low load bearing pipe may occur.

Therefore, in order to prevent wear of the low load bearing pipe and the screw conveyor, the screw conveyor is installed in a cylindrical casing made of steel or the like having a relatively high strength, and the low load bearing pipe and the screw conveyor are installed. Although there is a conventional method for preventing the contact of the conveyor, there is a problem that the weight is considerably heavy and a heavy machine is required, and the workability is deteriorated.

The present invention has been completed on the basis of the above problems and completed the present invention.

[0007]

That is, according to the present invention, a forward excavation blade is provided by providing a rotatable excavating blade at the tip of a front conductor which is attached to the tip of a small-diameter low load-bearing pipe to be buried and propelled into the ground. While excavating, the earth and sand that has been excavated by the digging blade and taken into the conductor, in an earth discharging device that conveys backward by a screw conveyor that is sequentially connected to the rear of the digging blade, a plurality of so as to cover the outer periphery of the screw conveyor. Provided is a small-diameter pipe-propelled soil discharging device provided with a protective device composed of a book connecting material and a ring fitting.

The protection device is constructed by fixing a plurality of connecting members, that is, round steel, with ring fittings at predetermined positions so as to form a cylinder. Further, by replacing the round steel with a connecting material using a hollow pipe, it is possible to install a hydraulic piping material such as a jack for correcting the direction of the leading conductor or an electric cable in the pipe.

[0009]

The inner wall of the low load bearing pipe is protected by the connecting member by the protective device provided so as to cover the outer periphery of the screw conveyor, and there is no contact with the screw conveyor to prevent abrasion and damage.

Further, since the protective device is light and lightweight with only a few connecting members, it is possible to easily hang down and install the protective device manually.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention are shown in FIGS. 1, 2 and 3
Shown in the figure and specifically described.

A small-diameter low load-bearing force pipe 6 to be buried at the rear end of the outer shell of the tip conductor 5 is fitted, and a tip of the tip conductor is provided with an excavating blade 7 for excavating the front ground, and behind the excavating blade 7. Joins the screw conveyor 8 which conveys the excavated earth and sand backwards one after another. As shown in FIG. 1, the soil discharging device of the present invention is provided with a protective device 1 between the screw conveyor 8 and the low load bearing pipe 6 so as to cover the outer periphery of the screw conveyor 8.

In this embodiment, as shown in FIG. 2, the protective device 1 includes a ring fitting 3 at a predetermined position so that the six connecting members 2 cover the outer periphery of the screw conveyor 8 and form a tubular shape.
It is fixed at. The length of the protective device 1 is made to be substantially the same as the length of the low load bearing pipe 6 to be buried, and the connection of the low load bearing pipe 6 and the screw conveyor 8 is performed each time the propulsion of each pipe is completed. Connections are made in parallel.

The pipe material used as the low load bearing pipe 6 is a thin-walled pipe such as a vinyl chloride pipe or a reinforced plastic composite pipe.

The small-diameter, low-load-bearing pipe propulsion and discharging device will be described in detail. When a driving machine (not shown) equipped on the starting shaft side is started, the screw conveyor 8 shaft is rotated, and the screw conveyor 8 is rotated. The excavating blade 7 connected to the tip also rotates and takes in the front conductor 5 while excavating the front ground. The earth and sand taken into the front conductor 5 is conveyed backward by the screw conveyor 8 and taken out to the ground from inside the starting shaft. At this time, the inner wall of the low load bearing pipe 6 is
It is protected by the six connecting members 2 of the protective device 1 provided on the outer periphery of the screw conveyor 8, so that abrasion and damage due to rotation of the screw conveyor 8 do not occur. In parallel with the excavation of the ground, by pressing the rear end of the low load bearing pipe 6, the front conductor 5 and the low load bearing pipe 6 are propulsively embedded in the ground.

In the description of the above embodiment, the propulsive force F is concentrated and applied to the rear end of the low load bearing pipe 6, but as shown in FIG. It is also possible to load the protective device 1 with the propulsive force F of the lead conductor 5 by connecting them so as to support them.

Further, by equipping the outer periphery of the protective device 1 at an arbitrary position with a gripper device 4 made of rubber or the like which is inflated by air or liquid and inscribed in the inner wall surface of the low load bearing pipe 6, the protective device is provided. By transmitting the propulsive force F of No. 1 by the frictional force between the gripper device and the inner wall surface of the low load bearing pipe 6, the propulsive force F may be concentrated at the rear end of the low load bearing pipe 6 and may be embedded in the propulsion without being loaded. it can.

As the connecting member 2 of the protective device 1 is a connecting member 2 using a hollow pipe as shown in FIG. 3, it is possible to improve the cross-sectional force and the weight, and at the same time, in the pipe. Hydraulic piping material 1 such as a jack for correcting the direction of the conductor 5
0 or the electric cable 11 can be installed.

During propulsion, the lower protective device 1 and the low load bearing pipe 6
Although excavated soil remains between the inner walls, after the completion of the propulsion, the screw conveyor 8 and the protective device 1 are sputtered off, and then the soil is removed and cleaned by a conventionally used high pressure washer or the like.

[0020]

With the soil discharging device of the present invention, the inner wall portion of the low load bearing pipe is free from wear and the like due to the rotation of the screw conveyor, and a low load bearing pipe suitable for the original purpose can be provided. In addition, the protective device is constructed by reducing the weight of only a plurality of round steels, etc., and it is possible to improve workability and safety without the need for heavy equipment for suspending and lowering the protective device during propulsion. .

[0021]

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view illustrating an entire small-diameter pipe propulsion and soil discharging device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a small diameter pipe propulsion and discharging device of the present invention.

FIG. 3 is a cross-sectional view showing an embodiment of the protective device of the present invention.

FIG. 4 is a vertical cross-sectional view showing a propulsion method for a small-diameter pipe, which is a conventional technique.

[Explanation of symbols]

 1 protective device 2 connecting material 3 ring metal fitting 4 gripper device 9 protective equipment support metal fitting

Claims (1)

[Scope of utility model registration request] 1. A digging blade that is attached to the tip of a small-diameter, low-load-bearing pipe to be buried and propelled into the ground to provide a rotatable digging blade to dig the front ground, In the earth discharging device that conveys the earth and sand excavated and taken into the front conductor to the rear by the screw conveyor that is sequentially connected to the rear of the excavating blade, it is composed of a plurality of connecting materials and ring fittings so as to cover the outer periphery of the screw conveyor. Small-diameter pipe-propulsion soil removal device equipped with a protective device.